GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Nov 2018, 14:40

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Events & Promotions

Events & Promotions in November
PrevNext
SuMoTuWeThFrSa
28293031123
45678910
11121314151617
18192021222324
2526272829301
Open Detailed Calendar
• How to QUICKLY Solve GMAT Questions - GMAT Club Chat

November 20, 2018

November 20, 2018

09:00 AM PST

10:00 AM PST

The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat.
• The winning strategy for 700+ on the GMAT

November 20, 2018

November 20, 2018

06:00 PM EST

07:00 PM EST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

Two centuries ago, Tufe Peninsula became separated form the mainland,

Author Message
TAGS:

Hide Tags

Intern
Joined: 24 Jun 2013
Posts: 49
Schools: ISB '16, NUS '15
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

19 May 2014, 01:22
Thanks Chiranjeev,

My Gaps are filling in .... Feeling GOOD.
Manager
Joined: 31 May 2012
Posts: 117
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

01 Jun 2014, 23:40
Premises:

1. 2 century ago, TP separated from mainland to form 2 regions- 1)mainland 2)Island

2. Island is drier than peninsula

3. Height of flower is Island 40 cm shorter than that in Mainland

Conclusion:
Current average height of Tufe’sTurfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Questions 1:
Option C says, Mainland sunflowers didn't grew taller due to environmental changes. This make me infer that sunflowers in island grew shorter.
This inference doesn't help to explain why this happened? What is the root cause of 40 cm shortness in island flowers.
I tend to seek the cause behind shortness of Island sunflowers and option D gave relief. Option (C) doesn't add any more information. It just says, Mainland flower didn't grew taller.

When I am asked to find WHY B is shorter than A, Answer Choice says, A is not taller.

Expert insight will help.

Question 2:
I didn't encounter similar question before. Do we have any other OG question like this ?
e-GMAT Representative
Joined: 02 Nov 2011
Posts: 2745
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

09 Jun 2014, 01:48
1
1
umeshpatil wrote:
Premises:

1. 2 century ago, TP separated from mainland to form 2 regions- 1)mainland 2)Island

2. Island is drier than peninsula

3. Height of flower is Island 40 cm shorter than that in Mainland

Conclusion:
Current average height of Tufe’sTurfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Questions 1:
Option C says, Mainland sunflowers didn't grew taller due to environmental changes. This make me infer that sunflowers in island grew shorter.
This inference doesn't help to explain why this happened? What is the root cause of 40 cm shortness in island flowers.
I tend to seek the cause behind shortness of Island sunflowers and option D gave relief. Option (C) doesn't add any more information. It just says, Mainland flower didn't grew taller.

When I am asked to find WHY B is shorter than A, Answer Choice says, A is not taller.

Expert insight will help.

Question 2:
I didn't encounter similar question before. Do we have any other OG question like this ?

Dear Umesh,

After going through your analyses of choices C and D, I feel that you are not asking yourself the right questions in the pre-thinking phase.

Accordingly, let's see where you may be faltering in applying the process.

Right now we are given three things, as you have rightly pointed.
1. Separation of the peninsula from the mainland
2. Difference in the environmental conditions between the peninsula and the island
3. Difference in the height of the sunflowers found on the island and those found on the mainland

On the basis of the above three facts, the author concludes that the difference in the environmental conditions between the peninsula and the island is responsible at least to some extent for the current (shorter) average height of the sunflowers found on the island. Now, in the pre-thinking phase for assumptions, what do we focus on? We try to think of scenarios in which the conclusion may not hold, right? Accordingly, what if someone told you that the difference in the height is not because the island sunflowers are shorter than before but because the mainland sunflowers are taller than before because of the changes in the environmental conditions on the mainland? Would the author's conclusion still be valid? Would the author still be able to blame the difference in the environmental conditions between the peninsula and the island as the cause for the difference in the average height of the sunflowers found at the two different places? The answer is NO! Choice C rules out this possibility by negating a possible counter to the link drawn between the difference in the environmental conditions between the peninsula and the island, and the difference in the height of the sunflowers. Try to negate Choice C and see the effect it has on the conclusion.

As regards choice D, ask yourself whether it is a must be true statement for the conclusion to hold true? Chiranjeev has addressed a similar doubt above. Please do present your analysis in the light of that discussion and we'll take our discussion forward from there.

Regards,

Neeti.
_________________

| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Intern
Joined: 29 Sep 2012
Posts: 3
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

16 Jul 2014, 09:23
jlgdr wrote:
sbsharma wrote:
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.

Could somebody explain why is C the answer?

Thanks
Cheers
J

The author’s underlying assumption in the stimulus is that the mainland’s environment has not changed. When the author says ”Tufe Island is significantly drier than Tufe Peninsula was.” the author is saying that the Island NOW is drier than the mainland WAS. Nothing is mentioned of the mainland NOW. Yet, the author concludes that the changes in height of the Turfil sunflowers that are located on the island are partially attributable to changes in environmental conditions of the island. We know that the conclusion is referring only to the island’s population since the stimulus only refers to the height of the island’s sunflower as being shorter. Now what would happen to the argument if it is found that the environment on the mainland changed as well?
Director
Joined: 23 Jan 2013
Posts: 569
Schools: Cambridge'16
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

17 Jul 2014, 04:56
sbsharma wrote:
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.

Argument structure is:

Island is dryer than was before
Sunflower in island has 40 cm lower in average--------->Average height attributable to environment change

Prethink:

1. Defender assumptions: There is no other factors/reasons why sf is lower, no data error, no reverse causation
2. Suporter (gap) assumptions: Being dryer than before is environmental change

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. Out of scope- we don't need other vegetaion
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today. Out of scope- we interested in height not in number
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago. Eliminate other factor that could be explanation-CORRECT

D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment. Introduce other factor - weakens the conclusion
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations. Out of scope- we interested exactly in this difference
Senior Manager
Joined: 23 Jun 2012
Posts: 385
Location: Pakistan
GPA: 3.76
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

22 Feb 2016, 03:33
I need an help regarding this question
option A says: There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. [it means that its the dry conditions (environmental change) that has an impact on all the vegetation. it confirms that the writer is true about conclusion that its the environment that has caused shorter length of Tufe.
_________________

Push yourself again and again. Don't give an inch until the final buzzer sounds. -Larry Bird
Success isn't something that just happens - success is learned, success is practiced and then it is shared. -Sparky Anderson
-S

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4230
Location: India
GPA: 3.5
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

22 Feb 2016, 10:14
sananoor wrote:
I need an help regarding this question
option A says: There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. [it means that its the dry conditions (environmental change) that has an impact on all the vegetation. it confirms that the writer is true about conclusion that its the environment that has caused shorter length of Tufe.

Lets try-

Quote:
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

The last sentence ( The conclusion ) of the stimulus is very important, it says everything the author wants to convey.

Now lets decode the authors reasoning.

Mainland - Height of Plant is H
Island - Height of Plant is H - 40

Now carefully check the last to sentences ( more closely on the green part ) which leads to the conclusion.

Quote:
Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedlyat least partially attributable to changes in Tufe’s environmental conditions.

This clearly means that change in environmental conditions ( Environment of the island becoming drier) may be one of the reasons ( There may be other factors as well) that have resulted in reduced height of the sunflowers in the island.

Lets check the option (A) -

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.

We do not have sufficient information to state whether any type of vegetation benefits or not , further it is doubtful what the term benefits exactly mean ( Does increase in height constitute as a benefit or something else)

Hence IMHO (C) is a better option, and if we negate the option the entire argument falls apart.
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Manager
Joined: 01 Mar 2014
Posts: 117
Schools: Tepper '18
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

27 Mar 2016, 23:29
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. - Irrelevant
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today. - Irrelevant
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago. - If we negate this, then that means that the mainland's environment has changed and hence is the reason for difference in length. This is a blow on the conclusion which states that the change in TUFE'S environment is the reason for the difference in height.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment. - This could be a possible explanation of the situation, but does not strengthen the author's conclusion - that environmental conditions on Tufe are a reason for difference in length. Hence this cannot be the assumption that the author made.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations. - Irrelevant
Senior Manager
Joined: 15 Oct 2015
Posts: 322
Concentration: Finance, Strategy
GPA: 3.93
WE: Account Management (Education)
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

03 Apr 2016, 02:43
jet1445 wrote:
Q40:
Two centuries ago, Tufe Peninsula became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers. This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland. Tufe Island is significantly drier than Tufe Peninsula was. So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Which of the following is an assumption on which the argument depends?

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

Was that cocnlusion striclty about Tufe ISland? So the mainland is not Tufe as well? Bcos the conclusion didnt say Tufe Island. I guess the answer is yes cos the mainland wasnt named at all.
Intern
Joined: 17 Mar 2015
Posts: 16
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

13 May 2016, 21:13
I think the question situation needs to be improved...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

should change to...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe island's environmental conditions.

Option C would then be more appropriate. Both the peninsula and the island are called "Tufe", so as it stands right now, even if you negative option C (mainland's environment HAS changed positively), you can still say that the changes in height are attributable to "changes in environment of Tufe (mainland)"...

What do you think egmat ?
Intern
Joined: 08 Apr 2016
Posts: 2
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

27 May 2016, 21:14
Hello,

Isn't this should be specific in the question, Tufe Island's Environmental conditions rather than Tufe's Environmental Conditions.
Intern
Joined: 08 Apr 2016
Posts: 2
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

27 May 2016, 21:17
[quote="TDK82"]I think the question situation needs to be improved...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.

should change to...

So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe island's environmental conditions.

Option C would then be more appropriate. Both the peninsula and the island are called "Tufe", so as it stands right now, even if you negative option C (mainland's environment HAS changed positively), you can still say that the changes in height are attributable to "changes in environment of Tufe (mainland)"...

I think the same.
Intern
Joined: 30 Jun 2014
Posts: 31
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

29 May 2016, 05:23
A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions. -- We're only concerned about Turfil sunflowers.
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today. -- The number of sunflowers is irrelevant.
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago. -- Correct assumption. No other cause could lead to the same effect. Also, negating this breaks the conclusion.
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment. -- The type of nutrients responsible for the 40-cm additional growth are out of scope.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations. -- We are not interested in any other differentiating factors.
Current Student
Joined: 08 Jan 2015
Posts: 80
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

01 Sep 2016, 00:16
Agree with comments above - the argument has to mention Island/Mainland in the conclusions, otherwise, even if C is negated, that doesn't ruin the argument since it's about the changes in the environment. Though, POE helps - no other choice stands closer to C, therefore C is the best option.
Intern
Joined: 27 Feb 2015
Posts: 48
Concentration: General Management, Economics
GMAT 1: 630 Q42 V34
WE: Engineering (Transportation)
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

01 Oct 2016, 13:06
does option C mean : its actually the plant in tufe peninsula that grows and plant in tufe island does not change and thats why the difference in height??
Intern
Joined: 31 May 2016
Posts: 1
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

06 Oct 2016, 06:46
C for me.

Height of TSP lesser than Height of TSM
Climate condition at P drier than Climate condition at M
=> Climate impacts TSP.

Therefore assumption should be taken at facevalue of the argumanet, assumption should be a regarding climate and TSP/TSM

Only B fits.

NOTE:
TSM: Tufe Sunflower at MAinland
TSM: Tufe Sunflower at Peninsulat
M: Mainland
P: Peninsula
Retired Moderator
Joined: 14 Dec 2013
Posts: 2990
Location: Germany
Schools: HHL Leipzig
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

07 Oct 2016, 07:08
1
1
deepak268 wrote:
does option C mean : its actually the plant in tufe peninsula that grows and plant in tufe island does not change and thats why the difference in height??

No, actually the other way round. The island plants grow 40 cm less than the mainland plants. However the point is not which group grows more - it is the difference in growth that matters:

There are 3 environmental conditions discussed here:

1. Past: the environmental condition of the mainland (the island was a part of the mainland then).
2. Present: the environmental condition of the mainland.
3. Present: the environmental condition of the island.

The argument is:
Present: the plan height on island is different from plant height on main land ( the plants under conditions 2 and 3 are different).
However the reason for this difference is stated as the difference between 1 and 3 ( NOT 2 and 3!)... "Tufe Island is significantly drier than Tufe Peninsula WAS". So it is assumed that condition 2 has not changed in the same way as condition 3.

Another approach (negation):

The mainland’s environment has not changed. Thus the conditions 2 and 3 are same now, so there is no environmental reason that the heights would be different. Thus the argument breaks down.

Option C is hence correct.
Senior Manager
Joined: 26 Dec 2015
Posts: 258
Location: United States (CA)
Concentration: Finance, Strategy
WE: Investment Banking (Venture Capital)
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

23 Feb 2017, 07:31
1
With assumption Q's, remember to negate:

A. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
"There are types of vegetation that are known to benefit from dry conditions". Out of scope -- we don't care about other types of vegetation
B. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
"There were not as many Turfil sunflowers on Peninsula 2 centuries ago as today". Out of scope, this doesnt address weather or any case that would make it true
C. The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.
"The mainland's environment HAS CHANGED in ways that resulted in T sunflowers on the mainland growing 40cm taller than 2 centuries ago". OK, so you're telling me before T Peninsula separated, both sunflowers were "X" height, then when the separation of the island finalized, the ENVIRONMENT CHANGED, allowing the sunflowers to grow? This would mean the sunflowers are "X+40cm" on the mainland!
D. The soil on Tufe Island, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
"The soil on Island, like that on the mainland, lacks important nutrients". This draws a SIMILARITY between the island and the mainland when comparing SOIL. However, we're curious to know about changed in the ENVIRONMENT and how the two geographies are DIFFERENT.
E. The 40-centimeter height difference between the Turfil sunflowers on Tufe Island and those on the mainland is the only difference between the two populations.
"40-cm height difference between T sunflowers on island and those on mainland is NOT the only difference." Out of scope. So what if it is? Only difference we care about is environmental factors that cause an increase in height

Intern
Joined: 30 Apr 2016
Posts: 6
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

04 Apr 2017, 19:32
i did not get the question.. can you explaib
Study Buddy Forum Moderator
Joined: 04 Sep 2016
Posts: 1253
Location: India
WE: Engineering (Other)
Re: Two centuries ago, Tufe Peninsula became separated form the mainland,  [#permalink]

Show Tags

18 Sep 2017, 15:58
Ashitha

Can you please elaborate what did you not understand in this question?
_________________

It's the journey that brings us happiness not the destination.

Re: Two centuries ago, Tufe Peninsula became separated form the mainland, &nbs [#permalink] 18 Sep 2017, 15:58

Go to page   Previous    1   2   3    Next  [ 42 posts ]

Display posts from previous: Sort by